Finding the Fourth Proportional to 2,123.90, 3,183.15 and 1,025.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.90 : 3,183.15 = 1,025.90 : x
2. Step 2: Convert to fraction form
   2,123.90/3,183.15 = 1,025.90/x
3. Step 3: Cross multiply
   2,123.90x = 3,183.15 × 1,025.90
4. Step 4: Simplify right side
   2,123.90x = 3,265,593.59
5. Step 5: Solve for x
   x = 3,265,593.59/2,123.90
6. Step 6: Final answer
   x = 1,537.55